Eric Anholt wrote: > A while ago I added the stuff to the config/cf/* to enable USE_SSE_ASM > on FreeBSD, but today found that it wasn't enabled on my athlon. I > added the proper sysctl check for it, but it still wasn't enabled. It > turns out the Athlon's extended CPUID function has most of the same > feature bits as the standard CPUID features function, but it doesn't > ever enable the SSE bit. I've made a patch that ORs in the bit from the > standard function, enabling SSE on new Athlons. It's attached. > > However, most of the demos I ran saw no improvement from this. The > exception was texcyl, which had an almost negligible but consistent > improvement. This is with a Radeon 7500, RADEON_NO_TCL=1. Are there > any demos in particular that would stress the code that's enabled with > sse that isn't masked out by 3dnow (transforms of normals?)?
demos/isosurf draws a lot of lit vertices. You might try that. > The total > difference on texcyl between sse/3dnow and no sse/3dnow was on the order > of 1%, so it was a poor benchmark to use. > > Anyone opposed to me committing? It looks good. Go ahead and apply it to your branch and the trunk. I'll apply it to Mesa CVS. -Brian ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek PC Mods, Computing goodies, cases & more http://thinkgeek.com/sf _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
